280 



PROCEEDINGS OP THE AMERICAN ACADEMY 



gland less 



segments deltoid, acute or acuminate, with a short claw, 

 definitely margined, often reaching nearly to the middle of' the blade. 

 fruiting pedicels spreading: capsule i to 1 inch long: seeds 3 to 5 

 lines long. — King's Rep. 5. 344. Amianthium Nuttallii, var. /?, 

 Gray, Rev. Melanth. 121. Helonias paniculata, Nutt. Journ. Philad.' 

 Acad. 7. 57. California (east slope of Sierra Nevada) and Idaho to 

 Utah and the Sackatchewan. 



* * * Gland obscure or almost wanting : perianth small, rotate or reflexed : 

 bulb narrow ; coats becoming fibrous. 

 7. Z. leimanthoides, Gray. Stem leafy, 1 to 4 feet high, from 

 a narrow oblong bulb: leaves 2 to 4 lines broad: racemes panicled, 

 rather dense and many-flowered: perianth-segments oblong, not 

 unguiculate, 2 lines long, adherent to the base of the ovary, white 

 becoming greenish or purplish : capsule 4 lines long, the cells slightly 

 divergent at top : seeds 4 in each cell, 3 lines long, somewhat mar- 

 gined below. — Manual, 525. Amianthium, Gray, Rev. Melanth. 1 25. 

 Amiantanthus, Kunth. New Jersey to Georgia. 



8. Z. angustifolius. Resembling the last : leaves 2 or 3 lines 

 broad : raceme simple : perianth free from the ovary : capsule more ob- 

 long (5 lines long), the cells not at all divergent: seeds about 4 lines 

 long. — Helonias, Michx. Amianthium, Gray, 1. c. 124 ; Chapm. Flora, 

 490. Amiantanthus, Kunth. N. Carolina to Florida and Alabama. ' 

 Two Mexican species are described, viz. : Z. volcanicus, Benth. 

 (PI. Hartw. 96), with elongated grass-like leaves, a rather tall slender 

 leafy stem, and flowers (3 lines long) on long divaricate pedicels in 

 open lax panicled racemes, the perianth adnate to the base of the 

 capsule ; and the quite doubtful Helonias virescens, HBK. (Anticlea 

 Mexicana, Kunth), described as low, with a very short somewhat 

 branched raceme of very small whitish flowers. But for the branch- 

 ing raceme it might be suspected of belonging to Schoznocaulon. The 

 Zygadenus Sibiricus, Gray (Anticlea, Kunth), should probably be 

 referred to Stenanthium, though the segments are glandular. 



43. SCHCENOCAULON, Gray. 



1. S. gracile, Gray. Scape very slender, 2 or 3 feet high : leaves 

 a line or two wide : flowers green, at length scattered in a spike 4 to 

 6 inches long; segments narrowly oblong, a line long or less: fila- 

 ments very slender : capsule nearly sessile, 4 lines long or more ; 

 cells about 7-seeded. — Rev. Melanth. 127. Helonias (?) dubia, 

 Michx. Southern Georgia to Florida. 



